PHOENIX -- Our big late-fall storm is still on track to move into Arizona later today and bring abundant rainfall to the state.
The low-pressure system is moving down the California coast and forecast to become nearly stationary this weekend before pushing through Arizona on Sunday. This will allow the storm to tap into a huge amount of tropical moisture, pulling it into Arizona for the next few days.
The high country will see rain today, and there's a slight chance for Valley rain today and this evening.
Rain chances increase tonight, when showers are expected to become widespread by tomorrow morning in the Valley. Rainfall amounts could top 1 to 2 inches in the Valley tomorrow, and scattered thunderstorms are also a possibility.
Today, look for mostly cloudy skies and highs in the mid 70s, but with heavy rain in the forecast tomorrow, we'll be lucky to make it out of the mid 60s. Mid 60s are in the forecast for Saturday and Sunday, too.
There's a good chance of rain through Saturday morning in the Valley, with more rain possible Saturday afternoon and Sunday, too. The storm finally exits our region on Monday, with drier weather on tap for the beginning of next week.
There's a chance for thunderstorms Friday through Sunday, as well.
Snow levels will be tricky to predict for this system, but it looks likely rain will switch over to snow at some point either Friday or early Saturday in Flagstaff as snow levels drop to near 7,000 feet. Snow levels will drop even lower Sunday, but the bulk of the moisture will be east of our area by then. Flagstaff looks likely to get between 3 and 6 inches of snowfall total, with higher elevations in Northern and Eastern Arizona getting more than 1 foot of snow.
There is a Winter Weather Watch in effect between tonight and Sunday morning for parts of Eastern Arizona, and a Flood Watch is in effect from tonight through 11 a.m. Saturday for the mountains of Yavapai and Gila Counties for the potential of 3 to 5 inches of rain.